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20130411
20130419
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to bring in pete williams, who's also standing by for us in washington, d.c. and pete, i understand that there was an initial positive test, but there's really no way to know whether it's really ricin until additional testing is done. >> ever since the anthrax mailings, no mail has gone directly to the white house, capitol hill and many other government offices. it's all sent to off site facilities to test it for various things. both facilities gave an initial positive for a poison called ricin. there were subsequent tests, they were conflicting. but you can't really know for sure what it is until it's sent to a lab and cultured and then you look under a mike scope to see what it is. now, we have seen events in the past, craig, ice ricin is made tr castor beans and someone will just take dried beans and grind them up and put them in a letter. now, that will test positive for ricin even though there's no ricin there. i guess it would be like the difference between poppies and opium. they're related, but it's not the same thing. so you won't know whether it's ricin until later today i
me now, nbc news justin correspondent pete williams and michael leiter. pete, ha have you learn about the bombs themselves? >> well, what we're told by authorities, andrea, is that they're crudely made. they appear to have been assembled inside a pressure cooker. it may be some of our younger viewers don't know what that is, but in the olden days when you wanted to make something tender, you put it in this pot with a tight lid on it. and the steam wouldn't escape and you could build up pressure and things cook faster in them. the premicrowave days. inside a pot like this, a pressure cooker is assembled the device. it includes a low-power explosive. something like black or smokeless powder, gun powder, if you will. not a high explosive like dynamite or a plastic explosive or the common tatp, which seems to be the one of voice of terrorists when they build bombs, terror bombs overseas. so it's crudely made, it's set off they believe by some kind of electronic timer. it's carried to the scene, they believe, in some kind of back pack and then just set down before the devices go off. unfor
, as pete williams and myself have been reporting all day, there is no suspect. there is no arrest. there is no specific name. now, we've been told that there have been several names out there that obviously they would want to run them down but we've been told that it's ruled out. the investigation is ongoing, moving forward. the piece of tape is one of many critical pieces that they are using to try to track suspects but right now no arrests. >> tell me how that's done. you're being looking at a piece of video, you enlarge it, try to improve its fidelity, its picture? what do you do? you look at the wanted posters? how do you identify -- do you look through mug shots? how do you find that person? >> the technology has improved tremendously in terms of facial recognition technology and they are using that matching images on video at the scene to any faces that might be in databases and running that to see if there's any sort of match. another way is, okay, here's an image that we've got. let's go back to others who we know that were at the scene and who were at businesses nearby an
straight to nbc news justice correspondent, pete williams, in washington. pete, there's been a lot of back and forth this afternoon. straighten it out for us. what have you heard about a potential person of interest and where are we in this investigation? >> well, what we're told is that the pictures have been quite valuable. that they've found from a surveillance camera on a building -- and this makes sense if you think about the building surveillance camera being up high so that it can look down on the crowd and get a sort of bird's eye view. that they think that they see a picture of exactly what they're looking for. someone setting down a backpack or a duffel bag and then walking away. that's the kind of picture they're looking for. they have seen a face on that picture, we're told. they're now trying to figure out who that person is, find them and question them. that's where it stands right now. we're told they don't know who that person is, but it's a rapidly moving investigation. i'm sure everyone would like to have this whole thing wrapped up by the time the president gets there to
this hour with nbc justice correspondent pete williams and former cia counterterrorism director larry johnson. two best guests we could have. pete, let's go back to that picture we just saw from whdh up there, boston affiliate of nbc. what are the experts making of the fact that it was there, that bag, whatever it is sitting there before the explosion and then in this picture taken afterwards you can see the smoke trailing up to the left there diagona diagonally? what does that tell us? >> it tells us it's something they're investigating, chris. they know, they believe very strongly that the bombs were brought to the scene in backpacks. but i think it's fair to say they're looking at whether after they got there, they put them in these shopping bags. now, that thing next to the -- to the bag that's just on the edge of the little spot shot circle there, that is a trash receptacle. could it be? it's a question. could it be the devices were placed in these trash bags next to trash receptacles to look inconspicuous? it's something that they're -- that they're studying and something that i
at the fragments left from the pieces of a pressure cooker. nbc news' pete williams points out that one of the pressure cooker lids ended up on the roof of a nearby building because the force of the explosion was so great. this photo shows bbs and a nail believed to be part of the shrapnel in one of the bombs along what could be the zipper from one of those black backpacks or nylon bags authorities have mentioned. investigators know the type of batteries use and michael isikoff reports they were in a battery pack made by a company in california used to power toy cars and often for sale in hobby shops. officials have opened up more of the area around the crime scene, focusing their investigation primarily on those two explosion points and the stretch of boylston street. i'm joined now by massachusetts governor deval patrick. thank you for joining me. >> thank you, lawrence. >> i'd like you to tell the story about how you found out about these explosions. i heard you explain this on a local interview. >> i had been out at the finish line crowning the men's and women's winners earlier in t
public. let's get to the latest with pete williams. i want to start with the two photos, the before and after of a bag next to a mailbox. how important are investigators thinking these could be? >> to be determined, i think. they are looking at this picture and similar pictures to see if that's how the bombs were placed. they're sort of contradictory photo evidence here about whether that's where they went because the after doesn't seem to show a lot of damage, but it's quite clear that the bombs themselves were not busted up into little tiny pieces and the pictures we're seeing show some large pictures of the cook er themselves. let me show you right here, you can see the brand name. inok. of one of the pressure cookers and on the pictures that show the batteries, this is a chinese made battery and these are also wires that were made in china. now, that kind of lead is very important because what they'll do now is to figure out who sells these pressure cooker, where would they have been bought. were they sold in the boston area? what about the wire? are there commonalities? where w
Search Results 0 to 6 of about 7